update readme

[yjhmelody]

No description provided.

[codecov]

Codecov Report

Merging #464 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #464   +/-   ##
=======================================
  Coverage   86.61%   86.61%           
=======================================
  Files          41       41           
  Lines        5103     5103           
=======================================
  Hits         4420     4420           
  Misses        542      542           
  Partials      141      141           

Impacted Files	Coverage Δ
reflect_struct_decoder.go	85.08% <0.00%> (ø)

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[AllenX2018]

Thanks